# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
# file LICENSE.rst or https://cmake.org/licensing for details.

#[=======================================================================[.rst:
FindXMLRPC
----------

Find xmlrpc

Find the native XMLRPC headers and libraries.

::

  XMLRPC_INCLUDE_DIRS      - where to find xmlrpc.h, etc.
  XMLRPC_LIBRARIES         - List of libraries when using xmlrpc.
  XMLRPC_FOUND             - True if xmlrpc found.

XMLRPC modules may be specified as components for this find module.
Modules may be listed by running "xmlrpc-c-config".  Modules include:

::

  c++            C++ wrapper code
  libwww-client  libwww-based client
  cgi-server     CGI-based server
  abyss-server   ABYSS-based server

Typical usage:

.. code-block:: cmake

  find_package(XMLRPC REQUIRED libwww-client)
#]=======================================================================]

# First find the config script from which to obtain other values.
find_program(XMLRPC_C_CONFIG NAMES xmlrpc-c-config)

# Check whether we found anything.
if(XMLRPC_C_CONFIG)
  set(XMLRPC_C_FOUND 1)
else()
  set(XMLRPC_C_FOUND 0)
endif()

# Lookup the include directories needed for the components requested.
if(XMLRPC_C_FOUND)
  execute_process(
    COMMAND ${XMLRPC_C_CONFIG} ${XMLRPC_FIND_COMPONENTS} --cflags
    OUTPUT_VARIABLE XMLRPC_C_CONFIG_CFLAGS
    OUTPUT_STRIP_TRAILING_WHITESPACE
    RESULT_VARIABLE XMLRPC_C_CONFIG_RESULT
    )

  # Parse the include flags.
  if("${XMLRPC_C_CONFIG_RESULT}" STREQUAL "0")
    # Convert the compile flags to a CMake list.
    string(REGEX REPLACE " +" ";"
      XMLRPC_C_CONFIG_CFLAGS "${XMLRPC_C_CONFIG_CFLAGS}")

    # Look for -I options.
    # FIXME: Use these as hints to a find_path call to find the headers.
    set(XMLRPC_INCLUDE_DIRS)
    foreach(flag ${XMLRPC_C_CONFIG_CFLAGS})
      if("${flag}" MATCHES "^-I(.+)")
        file(TO_CMAKE_PATH "${CMAKE_MATCH_1}" DIR)
        list(APPEND XMLRPC_INCLUDE_DIRS "${DIR}")
      endif()
    endforeach()
  else()
    message("Error running ${XMLRPC_C_CONFIG}: [${XMLRPC_C_CONFIG_RESULT}]")
    set(XMLRPC_C_FOUND 0)
  endif()
endif()

# Lookup the libraries needed for the components requested.
if(XMLRPC_C_FOUND)
  execute_process(
    COMMAND ${XMLRPC_C_CONFIG} ${XMLRPC_FIND_COMPONENTS} --libs
    OUTPUT_VARIABLE XMLRPC_C_CONFIG_LIBS
    OUTPUT_STRIP_TRAILING_WHITESPACE
    RESULT_VARIABLE XMLRPC_C_CONFIG_RESULT
    )

  # Parse the library names and directories.
  if("${XMLRPC_C_CONFIG_RESULT}" STREQUAL "0")
    string(REGEX REPLACE " +" ";"
      XMLRPC_C_CONFIG_LIBS "${XMLRPC_C_CONFIG_LIBS}")

    # Look for -L flags for directories and -l flags for library names.
    set(XMLRPC_LIBRARY_DIRS)
    set(XMLRPC_LIBRARY_NAMES)
    foreach(flag ${XMLRPC_C_CONFIG_LIBS})
      if("${flag}" MATCHES "^-L(.+)")
        file(TO_CMAKE_PATH "${CMAKE_MATCH_1}" DIR)
        list(APPEND XMLRPC_LIBRARY_DIRS "${DIR}")
      elseif("${flag}" MATCHES "^-l(.+)")
        list(APPEND XMLRPC_LIBRARY_NAMES "${CMAKE_MATCH_1}")
      endif()
    endforeach()

    # Search for each library needed using the directories given.
    foreach(name ${XMLRPC_LIBRARY_NAMES})
      # Look for this library.
      find_library(XMLRPC_${name}_LIBRARY
        NAMES ${name}
        HINTS ${XMLRPC_LIBRARY_DIRS}
        )
      mark_as_advanced(XMLRPC_${name}_LIBRARY)

      # If any library is not found then the whole package is not found.
      if(NOT XMLRPC_${name}_LIBRARY)
        set(XMLRPC_C_FOUND 0)
      endif()

      # Build an ordered list of all the libraries needed.
      set(XMLRPC_LIBRARIES ${XMLRPC_LIBRARIES} "${XMLRPC_${name}_LIBRARY}")
    endforeach()
  else()
    message("Error running ${XMLRPC_C_CONFIG}: [${XMLRPC_C_CONFIG_RESULT}]")
    set(XMLRPC_C_FOUND 0)
  endif()
endif()

# Report the results.
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
    XMLRPC
    REQUIRED_VARS XMLRPC_C_FOUND XMLRPC_LIBRARIES
    FAIL_MESSAGE "XMLRPC was not found. Make sure the entries XMLRPC_* are set.")